CN101871374A - Triangular flash circulating system and method thereof - Google Patents
Triangular flash circulating system and method thereof Download PDFInfo
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- CN101871374A CN101871374A CN 201010205204 CN201010205204A CN101871374A CN 101871374 A CN101871374 A CN 101871374A CN 201010205204 CN201010205204 CN 201010205204 CN 201010205204 A CN201010205204 A CN 201010205204A CN 101871374 A CN101871374 A CN 101871374A
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Abstract
The invention discloses a triangular flash circulating system, wherein, an evaporator, a decompression mechanism, a first screw expansion power machine and a condenser are sequentially connected together through a pipeline to form a working medium circulating passage; the evaporator is equipped with a heating passage for heating the working medium in the working medium circulating passage; and the condenser is equipped with a cooling passage for cooling the working medium in the working medium circulating passage. In addition, the invention further provides a triangular flash circulating method, comprising the following steps: A. heating the working medium in the working medium circulating passage through the heating passage; B. decompressing the heated working medium so that the working medium reaches a flash critical state; C. allowing the working medium in the flash critical state to enter the screw expansion power machine for flash work; and D. cooling the working medium flowing out of the screw expansion power machine through the cooling passage, and then repeatedly operating the above steps. The triangular flash circulating system and the method thereof provided by the invention can fully utilize residual heat resources and improve residual heat utilization ratio.
Description
Technical field
The present invention relates to the expansion motor system field, specifically be meant a kind of triangular flash circulating system and method.
Background technique
Screw expansion motor mainly is the power sources such as steam, hot water, hydrothermal solution or stream-liquid two-phase flow body that utilize in the industry, with thermal power transfer is power, drive generator for electricity generation, or directly drive machinery such as blower fan, water pump, compressor, stirrer, coal pulverizer, flour mill, substitute motor, or substitute the recovery power such as expansion valve of large-scale refrigerator.Screw expansion motor comprises two (yin, yang) screw rotors, shell, bearing and seal arrangements etc.During work, the heat source body medium is introduced into machine inner screw teeth groove, and lead-screw rotates, and along with screw rod rotates, volume constantly increases, and heat source body step-down cooling is expanded and done work, and discharges gas at last, from main shaft sun screw rod output power, drives generator.
Current, Chinese national economy faces energy saving and environmental protection two is challenged greatly, and sufficiently and reasonably utilizing the energy is the key of sustainable development.The characteristics of China's energy resource structure, the energy fully do not reach cascade utilization, and the overall utilization ratio of the energy is lower, and residual heat resources are abundant still not to be made full use of.For example iron and steel metallurgical industry, thermoelectric power industry, petroleum chemical industry, cement industry, papermaking printing industry, and other need the industry of industrial boiler, the utilization of residual heat resources has huge market potential.This has proved absolutely that not only China strengthens the significance and the urgency of energy conservation, has also embodied the application prospect of screw expansion motor simultaneously.
Because general screw expansion motor system is to adopt single loop system, is about to contain hot fluid and directly introduces the screw expansion motor acting.Single loop system is applicable to the energy utilization of high-temperature, high pressure fluid.Now, some have also occurred and utilized the binary cycle system of screw expansion motor, promptly lower boiling organic working medium with contain hot fluid and carry out introducing again after the heat exchange screw expansion motor acting.Binary cycle system does not have too high requirement to the water quality quality that contains hot fluid and the temperature and the pressure of fluid, even the low-temperature water heatings under six or seven ten degree normal pressures, can be by binary cycle system with heat energy recycle yet.But, no matter be single loop system, binary cycle system, the recycling efficient of heat energy all has much room for improvement, and therefore, is badly in need of a kind of screw expansion motor system that can promote heat energy recycle efficient of invention.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is, a kind of triangular flash circulating system and method are provided, and can utilize residual heat resources more fully, improves UTILIZATION OF VESIDUAL HEAT IN efficient.
In order to solve above technical problem, triangular flash circulating system provided by the invention, comprise the mechanism of decompressor, vaporizer, first screw expansion motor, condenser, described vaporizer, the mechanism of decompressor, first screw expansion motor, condenser are in turn connected to form the working medium peripheral passage by pipeline, described vaporizer is provided with the thermal path that adds that is used to heat working medium in the described working medium peripheral passage, and described condenser is provided with the coolant path that is used to cool off working medium in the described working medium peripheral passage.
Preferably, the described thermal path that adds comprises vaporizer in heat source body, second screw expansion motor, the described working medium peripheral passage, and described heat source body, second screw expansion motor, vaporizer connect successively by pipeline.
Preferably, be provided with first bypass between described heat source body and the described vaporizer, described first bypass is provided with first control valve.
Preferably, described coolant path comprises the condenser in cold water source body, water supply pump and the described working medium peripheral passage, and described cold water source body, water supply pump and described condenser are connected to form the path of cooling working medium by pipeline.
Preferably, be provided with second bypass between described vaporizer and the described condenser, described second bypass is provided with second control valve.
Preferably, also comprise preheater, an end of described preheater is arranged between described condenser and the vaporizer, and the other end of described preheater is arranged between described vaporizer and the heat source body.
Preferably, be provided with water tank between described preheater and the described heat source body, described water tank is connected with condensate pump.
Preferably, be provided with the 3rd bypass between described water tank and the described heat source body, described the 3rd bypass is provided with the 3rd control valve.
Preferably, be provided with between described condenser and the described preheater and hold the working medium jar, the described working medium jar that holds is connected with working medium pump.
Preferably, described holding between working medium jar and the described preheater is provided with the 4th bypass, and described the 4th bypass is provided with the 4th control valve.
In addition, the present invention also provides a kind of triangular flash circulation method, comprises the steps:
A, by adding the working medium in the thermal path heating working medium peripheral passage;
B, the working medium after will heating reduce pressure, and make working medium reach the threshold state of flash distillation;
C, the working medium that is in the threshold state of flash distillation enter screw expansion motor flash distillation acting;
D, flow out the working medium of screw expansion motor by coolant path cooling;
The cycling above-mentioned steps.
Triangular flash circulating system provided by the invention, institute's vaporizer, the mechanism of decompressor, first screw expansion motor, condenser are in turn connected to form the working medium peripheral passage by pipeline, described vaporizer is provided with the thermal path that adds that is used to heat working medium in the described working medium peripheral passage, and described condenser is provided with the coolant path that is used to cool off working medium in the described working medium peripheral passage.The workflow of triangular flash circulating system provided by the invention is as follows: at vaporizer by adding the working medium in the thermal path heating working medium peripheral passage; By the mechanism of decompressor working medium after heating is reduced pressure again, make working medium reach the threshold state of flash distillation; The working medium that is in the threshold state of flash distillation enters screw expansion motor flash distillation acting; Flow out the working medium of screw expansion motor by the coolant path cooling at condenser.Compared with prior art, triangular flash circulating system provided by the invention can utilize residual heat resources more fully, improves UTILIZATION OF VESIDUAL HEAT IN efficient.
In addition, the present invention also provides a kind of corresponding triangular flash circulation method.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1 intermediate cam flashed steam cycle system;
Fig. 2 is the structural representation of the embodiment of the invention 2 intermediate cam flashed steam cycle systems.
Embodiment
For those skilled in the art can understand technological scheme provided by the present invention better, set forth below in conjunction with specific embodiment.
See also Fig. 1, this figure is the structural representation of the embodiment of the invention 1 intermediate cam flashed steam cycle system.
The triangular flash circulating system that present embodiment provides, comprise the mechanism of decompressor, vaporizer 3, first screw expansion motor 10, condenser 12, vaporizer 3, the mechanism of decompressor, first screw expansion motor 10, condenser 12 are in turn connected to form working medium peripheral passage S2 by pipeline, vaporizer 3 be provided be used for working medium in the S2 of heating working medium peripheral passage add thermal path S1, condenser 12 is provided with the coolant path S3 that is used for working medium in the S2 of cooling working medium peripheral passage.
The triangular flash circulating system that present embodiment provides adds thermal path S1 and comprises heat source body 1, second screw expansion motor 8, vaporizer 3, and heat source body 1, second screw expansion motor 8, vaporizer 3 are in turn connected to form by pipeline and add thermal path; Working medium peripheral passage S2 comprises vaporizer 3, mechanism of decompressor (not shown), first screw expansion motor 10, the condenser 12 that adds among the thermal path S1, and vaporizer 3, the mechanism of decompressor, first screw expansion motor 10, condenser 12 are in turn connected to form working medium peripheral passage S2 by pipeline; Condenser 12 is provided with the coolant path S3 that is used for the working medium that circulates in the S2 of cooling working medium peripheral passage; Coolant path S3 comprises the condenser 12 among cold water source body 14, water supply pump 17 and the working medium peripheral passage S2, and cold water source body 14, water supply pump 17 and condenser 12 are connected to form the path S3 of cooling working medium by pipeline.
Second screw expansion motor 8, first screw expansion motor 10 are connected with respectively between generator 6, motor 5, the second screw expansion motors 8, first screw expansion motor 10 and generator 6, the generator 5 and are provided with speed reducer.
Be provided with first bypass between heat source body 1 and the vaporizer 3, first bypass is provided with first control valve 2; Be provided with second bypass between vaporizer 3 and the condenser 12, second bypass is provided with second control valve 11.
One end of preheater 4 is arranged between the condenser 12 and vaporizer 3 of working medium peripheral passage S2, and the other end of preheater 4 is arranged between the vaporizer 3 and heat source body 1 that adds thermal path S1.
Be provided with water tank 13 between preheater 4 and the heat source body 1, water tank 13 is connected with condensate pump 9.Be provided with the 3rd bypass between water tank 13 and the heat source body 1, the 3rd bypass is provided with the 3rd control valve 7.Be provided with between condenser 12 and the preheater 4 and hold working medium jar 18, hold working medium jar 18 and be connected with working medium pump 16.Hold between working medium jar 18 and the preheater 4 and be provided with the 4th bypass, the 4th bypass is provided with the 4th control valve 15.
The thermal source that heat source body 1 provides can be steam, hot water, hydrothermal solution or stream-liquid two-phase flow body etc., and present embodiment is that example is done explanation with hot water.The working medium of working medium peripheral passage S2 is low boiling working fluid.
The workflow of the triangular flash circulating system that present embodiment provides is as follows:
The hot water that provides when heat source body 1 can reach directly when the requiring of second screw expansion motor, 8 actings, and first control valve 2, second control the 11, the 3rd control valve 7 and the 4th control valve 15 are closed.Hot water is successively along pipeline flow through second screw expansion motor 8, vaporizer 3, preheater 4, water tank 13, by condensate pump 9 water of condensation of 13 li of water tanks pumped into heat source body 1 again, and this is for adding thermal path S1.Hot water circuit enters 8 actings of second screw expansion motor, and second screw expansion motor 8 drives generator 6 generatings.
Low boiling working fluid along pipeline flow through vaporizer 3, the mechanism of decompressor, first screw expansion motor 10, vaporizer 12, hold working medium jar 18, by working medium pump 16 low boiling working fluid is pumped into preheater 4 preheatings again, this is working medium peripheral passage S2.Hot water is from the vaporizer 3 of flowing through after second screw expansion motor 8 flows out, hot water heats low boiling working fluid in vaporizer 3, the low boiling working fluid temperature is raise, advanced the mechanism of decompressor again the working medium after heating is reduced pressure, make working medium reach the threshold state of flash distillation; The working medium that is in the threshold state of flash distillation enters first screw expansion motor, 10 flash distillations acting.First screw expansion motor 10 drives generator 5 generatings.Low boiling working fluid after the acting flows out from first screw expansion motor 10 and enters condenser 12, in condenser by cooling water with the low boiling working fluid condensation, enter and hold in the working medium jar 18.
The hot water that provides when heat source body 1 can not reach directly when the requiring of second screw expansion motor, 8 actings, and second control valve 11, the 3rd control valve 7 and the 4th control valve 15 are closed, and first control valve 2 is opened.Hot water is successively along pipeline flow through vaporizer 3, preheater 4, water tank 13, by condensate pump 9 water of condensation of 13 li of water tanks pumped into heat source body 1 again.
Low boiling working fluid along pipeline flow through vaporizer 3, the mechanism of decompressor, first screw expansion motor 10, vaporizer 12, hold working medium jar 18, by working medium pump 16 low boiling working fluid is pumped into preheater 4 preheatings again.Hot water is from heat source body 1 vaporizer 3 of flowing through, and hot water heats low boiling working fluid in vaporizer 3, and the low boiling working fluid temperature is raise, and advances the working medium of the mechanism of decompressor after to heating again and reduces pressure, and makes working medium reach the threshold state of flash distillation; The working medium that is in the threshold state of flash distillation enters first screw expansion motor, 10 flash distillations acting.First screw expansion motor 10 drives generator 5 generatings.Low boiling working fluid after the acting flows out from first screw expansion motor 10 and enters condenser 12, in condenser 12 by cooling water with the low boiling working fluid condensation, enter and hold in the working medium jar.
Compared with prior art, triangular flash circulating system provided by the invention can utilize residual heat resources more fully, improves UTILIZATION OF VESIDUAL HEAT IN efficient.
Certainly, more than only be preferred implementation of the present invention, should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. triangular flash circulating system, it is characterized in that, comprise the mechanism of decompressor, vaporizer, first screw expansion motor, condenser, described vaporizer, the mechanism of decompressor, first screw expansion motor, condenser are in turn connected to form the working medium peripheral passage by pipeline, described vaporizer is provided with the thermal path that adds that is used to heat working medium in the described working medium peripheral passage, and described condenser is provided with the coolant path that is used to cool off working medium in the described working medium peripheral passage.
2. triangular flash circulating system according to claim 1, it is characterized in that, the described thermal path that adds comprises vaporizer in heat source body, second screw expansion motor, the described working medium peripheral passage, and described heat source body, second screw expansion motor, vaporizer connect successively by pipeline.
3. triangular flash circulating system according to claim 2 is characterized in that, is provided with first bypass between described heat source body and the described vaporizer, and described first bypass is provided with first control valve.
4. triangular flash circulating system according to claim 1, it is characterized in that, described coolant path comprises the condenser in cold water source body, water supply pump and the described working medium peripheral passage, and described cold water source body, water supply pump and described condenser are connected to form the path of cooling working medium by pipeline.
5. triangular flash circulating system according to claim 1 is characterized in that, is provided with second bypass between described vaporizer and the described condenser, and described second bypass is provided with second control valve.
6. triangular flash circulating system according to claim 1 is characterized in that, also comprises preheater, and an end of described preheater is arranged between described condenser and the vaporizer, and the other end of described preheater is arranged between described vaporizer and the heat source body.
7. triangular flash circulating system according to claim 6 is characterized in that, is provided with water tank between described preheater and the described heat source body, and described water tank is connected with condensate pump.
8. triangular flash circulating system according to claim 7 is characterized in that, is provided with the 3rd bypass between described water tank and the described heat source body, and described the 3rd bypass is provided with the 3rd control valve.
9. triangular flash circulating system according to claim 6 is characterized in that, is provided with between described condenser and the described preheater and holds the working medium jar, and the described working medium jar that holds is connected with working medium pump.
10. triangular flash circulating system according to claim 9 is characterized in that, described holding between working medium jar and the described preheater is provided with the 4th bypass, and described the 4th bypass is provided with the 4th control valve.
11. a triangular flash circulation method comprises the steps:
A, by adding the working medium in the thermal path heating working medium peripheral passage;
B, the working medium after will heating reduce pressure, and make working medium reach the threshold state of flash distillation;
C, the working medium that is in the threshold state of flash distillation enter screw expansion motor flash distillation acting;
D, flow out the working medium of screw expansion motor by coolant path cooling;
The cycling above-mentioned steps.
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| CN 201010205204 CN101871374A (en) | 2010-06-18 | 2010-06-18 | Triangular flash circulating system and method thereof |
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| CN 201010205204 CN101871374A (en) | 2010-06-18 | 2010-06-18 | Triangular flash circulating system and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103147812A (en) * | 2013-03-25 | 2013-06-12 | 上海西重所重型机械成套有限公司 | Screw expander type flue gas waste heat power generation device |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| CN105464730A (en) * | 2016-01-07 | 2016-04-06 | 上海维尔泰克螺杆机械有限公司 | Waste heat recovery system for low-temperature flue gases and low-temperature hot fluids |
| CN105484811A (en) * | 2016-01-07 | 2016-04-13 | 上海维尔泰克螺杆机械有限公司 | Recycling system for low-temperature thermal fluid |
| CN106224023A (en) * | 2016-07-26 | 2016-12-14 | 西安交通大学 | A kind of combined cycle indirect air cooling system |
| CN114483231A (en) * | 2022-02-09 | 2022-05-13 | 西安交通大学 | Compressed air energy storage system and control method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147812A (en) * | 2013-03-25 | 2013-06-12 | 上海西重所重型机械成套有限公司 | Screw expander type flue gas waste heat power generation device |
| CN103147812B (en) * | 2013-03-25 | 2016-03-30 | 上海西重所重型机械成套有限公司 | A kind of screw expander formula flue gas waste heat power generation device |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| CN104296544B (en) * | 2014-10-13 | 2016-07-06 | 中信重工机械股份有限公司 | A kind of low-temperature cogeneration flash system |
| CN105464730A (en) * | 2016-01-07 | 2016-04-06 | 上海维尔泰克螺杆机械有限公司 | Waste heat recovery system for low-temperature flue gases and low-temperature hot fluids |
| CN105484811A (en) * | 2016-01-07 | 2016-04-13 | 上海维尔泰克螺杆机械有限公司 | Recycling system for low-temperature thermal fluid |
| CN106224023A (en) * | 2016-07-26 | 2016-12-14 | 西安交通大学 | A kind of combined cycle indirect air cooling system |
| CN114483231A (en) * | 2022-02-09 | 2022-05-13 | 西安交通大学 | Compressed air energy storage system and control method thereof |
| CN114483231B (en) * | 2022-02-09 | 2023-08-29 | 西安交通大学 | Compressed air energy storage system and control method thereof |
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Application publication date: 20101027 |